.red {
  color: #f50;
}
.dep {
  display: flex;
  flex-direction: column;
}
.tree {
  padding-bottom: 50px;
  flex: 1;
}
.header {
  background: #252b31;
  position: sticky;
  top: 0;
  z-index: 9;
}
.footer {
  position: absolute;
  bottom: 0;
  padding: 20px;
  width: 100%;
  text-align: right;
  left: 0;
  display: flex;
  align-items: center;
  background: #1f1f1f;
}
.footer .left {
  flex: 1;
  text-align: left;
}
.footer .confirm {
  margin-right: 20px;
}
